Safety appliance for engines.



PATENTED JUNE 27, 1905.

I No. 793,550.

H. S. STORMER. SAFETY APPLIANCE FOR ENGINES.

APPLICATION FILED NOV. 22, 1904.

liar/622167,

Patented June 27, 1905.

PATENT OEEIcE.

HARRY S. STORMER, OF JOHNSTQVVN, PENNSYLVANIA.

SAFETY APPLIANCE FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 793,550, dated June 27,1905.

Application filed November 22, 1904. Serial No. 233,879.

To aZZ whom, it may concern:

Be it known that I, HARRY S. STORMER, a

citizen of the United States, residing at J ohnsfor engines.

1 shall show and describe the device in order to mdicate its manyadvantages 1n connection with a steam-engine; but of course I do notlimit the invention -to such particular use.

The device operates in conjunction with a governor, it being of such acharacter that should the belt connecting the governor with theengine-shaft break or jump from its pulleys the engine will be at oncestopped. I am familiar with a number of safetydevices for doing the samething which have been in use, but which have been discarded owing totheir failure to operate as intend ed at critical times, and even underthe most favorable conditions these prior devices operate, if at all,only when the engine with which they are associated is running under aneven or uniform load.

I provide a safety device which is simple in construction, whichrequires no attention from an engineer, and which in no wise interfereswith the normal operation of an engine, and

- which assures the operation of the latter under a variable load.

In the drawings accompanying and forming a part of this specification Iillustrate a simple adaptation involving my invention which I will setforth at length in the following description; but Ido not limit myselfto the disclosure thus made, for certain variations may be adoptedwithin the scope of my claims succeeding said description.

Referring to the drawlngs, Figure 1 1s a sectional side elevation of asafety appliance or governor mechanism involving my invention andshowing the, same associated with an engine of the Corliss type. Fig. 2is an enlarged sectional elevation of a casing or boxqng in whichcertain of the operating parts of the appliance are housed. view of arocking member.

Fig. 3 is a detail Fig. 4 is a detail in sectional plan of the outer endof the swinging arm hereinafter more particularly described. Fig. 5 is afront elevation of the same. Fig. 6 is an elevation of certain of theparts appearing in Fig. 1 and as looking from the right in said figuretoward the left, the parts being the casing 10, the rod 11, and governormechanism above the same.

Like characters refer to like parts throughout the different views.

In Fig. 1 I have illustrated portions of an engine of the Corliss type,with which my device will satisfactorily operate, the cylinder shown inFig. 1 having the usual inlet or supply and exhaust valves. Looselycarried by the stems of the supply-valves are the angle-v levers 2, onearm of each of which carries a forked link, as 3, the shouldered branchof which cooperates witha block 4:, rigidly fastened to the outer end ofa crank 5. The cranks 5 are rigidly connected with the two supplyvalvestems. The other branch of each link cooperates with a trip device on acollar 6. The two collars are loose on the supply-valve stems. Saidcollars 6 are connected to the governor (denoted in a general way by 8)by means of thegovernor-rods 7 and rocker 7. governor, which is of thefly-ball type, and the engine-shaft need not be described in detailexcept to state that they involve a belt, as 9, and it is with this beltthat my safety device cooperates, its function being, as hereinbeforestated, to cause through cooperating means the stoppage of the engineshould the belt break or jump or be pulled from its pulley- Of theseveral valve parts I have deemed it necessary to show only one of thesupply or inlet valves and its immediate cooperating parts in order toillustrate the mode of operation of the safety device. Upon the collars6 are knock-off blocks 6, only one of which, however, is shown, andwhich coact with the safety device and with the links 3. During thenormal operation of the engine these knock-off blocks 6, which have aback-andforth movement below the inner branches of said links, do notstrike said inner branches, but on one stroke approach near the same.Should a belt break, however, the collars 6 will be permitted to have anabnormal move- The connections between the.

ment through the release of the governor 8 and governor-rods 7, and onthis abnormal movementthe knock-off blocks strike the links 3 anddisengage the same from the blocks 4, thereby to permit the instantclosing of the su pply-valves and the stoppage of the engine.

Associated with the governor-post in any desirable way is a casing orboxing, as 10, -which may be made by casting or in any other desirableway. The top of the casing or boxing has a perforation or hole toreceive the lower portion of the rod 11. Said rod 11, which isvertically disposed, extends between its ends through a perforation inthe col lar 12, clamped or otherwise suitably attached to the post orstandard of the governor 8 and ing 10.

constituting a convenient guide for said rod. The lower end of the rod11 rests upon the detent 13, indicated as aslide,suitably guided forhorizontal movement within the casing or box- The upper end of the rod11 is arranged in the path of the forwardly-extending arm of the rocker7 and is engaged by extending arm of the rocker said forwardly-extendingarm on the downward movement thereof, the arm on its upward movementpassing free of the rod. The rod, therefore, limits the motion of therocker and necessarily of the governor and insures the normal operationof the engine, during which normal operation, as will be understood fromthe foregoing statements, the knock-off blocks 6 approach, but do notstrike the links 3. Should, however, the governor-belt 9, as willhereinafter appear, break, the detent 13 will be automatically movedaway from the base of the rod 11, so that the latter can dropautomatically and away from the forwardly- 7, freeing said arm andnecessarily the governor, so that the balls thereof can drop, and, inthe present instance,impart,through the intermediate parts,

- a thrust to the governor-rods 7, in order that the knock-off blocks 6may be given their abnormal movement, hereinbefore indicated, to causethem to trip the links 3 and free the two supply-valves.

Supported by the casing or boxing 10 is a rocking member made up of ashaft 14, pro- .vided with a crank-arm 15 at its outer end, and an arm16, disposed at right angles to the said shaft. The inner face of thehub of the arm 16 has a notch to snugly receive a lug 17 on the adjacentend of the rock-shaft 14, the relation mentioned being maintained by abolt 18-, extending through registering bores in the shaft and hub ofthe arm 16, respectively. The outer side of the hub of said arm 16 isreduced to fit for rocking motion a perforation is outside of the casing10, and between the nut and the casing a washer is interposed. The bolt,with its nut and washer therefor,

not only maintains the two parts of the rocking member in rigidrelation, but also holds said rocking member, made up of the shaft 14,arm 16, and associated swinging parts, in working connection with thecasing. The upper end of the arm 16 is forked, the fork being adapted toenter a slot formed depthwise in the outer end of the sliding detent 13and to receive between its branches a pin, as 19, extending transverselyof the slot and which may be in the form of a rivet.

In the opposite inner faces of the casing 10 are formed channels curvedin cross-section to agree with the curvature of a bore 20, formed in theweb of the boxing or that part thereof joining the sides, said bore andchannels constituting a seat and guiding means for a coiled push-spring21, which is compressed by the arm 16, as will hereinafter appear.

It will be remembered that the rock-shaft 14 has a crank-arm 15,disposed outside of the casing 10. To this crank-arm may be bolted orotherwise suitably connected an elongated rod 22, the rod and itsprojection, hereinafter described, constituting, in effect, a part ofthe rocking member, to which I have hereinbefore alluded. Suitablyassociated with the outer end of the rod 22 is a spindle or stub-shaft23, upon which the roller or wheel 24 is adapted to turn, the rollerbeing removably connected with the spindle by means of a screw or bolt25, and between the head of said screw or bolt and the outer face of theroller a washer is interposed. The wheel or roller 24 when the safetydevice is in operative position is adapted to engage or rest against oneof the runs of the belt 9, the upper run in the present case, duringwhich time the sliding detent 13 will be in its normal position or oneto limit through the rod 11" the movement of the governor 8 and assurethe normal operation of the engine. The arm 16 at this time will bewholly housed within the casing or boxing 10 and will compress thespring 21, so that should the belt 9 break or jump from its pulleys suchact will at once release the swinging member, including in its make-upthe rod 22. When the said rod is released, it will move in suchdirection as to swing the arm 16 in a direction to carry its upper endout of the casing, and the arm being operatively united with the slidingdetent the latter will be moved in a direction to release the rod 11inorder to permit the rod, and hence the governor-balls, to drop andeffect the stoppage of the engine in the manner hereinbefore described.It will be evident that 1 do not wholly rely upon the weight of thewheel or roller 24 in order to cause the operation of the sliding detentin a direction to release the rod 11, but that I augment the effect ofthe wheel by the power of the spring 21. This, however, is notessential, for I might rely wholly upon the spring or wholly upon thewheel, these being matters of detail. I

The engine illustrated is of the horizontal type; but the appliance willwork equally satisfactorily with engines of another type, for, as I haveindicated, I do not limit the use of the device to connection with anyparticular kind of engine.

The roller or wheel 24 is not directly car-v ried. by the body of thearm or rod 22; butits spindle is carried by a block 26, fitted betweenthe branches of a bifurcation carried upon the outer end of said rod orarm. Through registering perforations in the "branches and blocks boltsor equivalent holding-pins 27 pass in order to hold the roller normallyat right angles to the said armor rod, during which time it can restagainst the belt 9. Should an engineer desire to test the operativenessof the device at any time, this can readily be accomplished by swingingthe roller from ofi or away from the belt, which can be brought about asfollows: The inner bolt or pin 27 will be removed, so that the rollerand its carrier or block can be swung laterally away from the belt--thatis to say, the roller will be swung bodily from off the belt and aroundthe outer bolt 27 as a pivotand when this is done the rod 22 can beswung in a-direction to cause therelease by the detent of thegovernor-limiting rod 11. I/Vhen the rod is released, it can of coursedrop down exactly as it would do automatically if everything is inproper order. After the test has been made the roller and its carrierwill be returned to their original positions and the inner bolt 27inserted in place.

The safety device is thoroughly effective in operation and simple inconstruction. It does not prevent the normal or proper operation of theengine; but should the governor-belt break or be pulled from its pulleysthe engine will be at once stopped.

The working parts of the safety appliance are housed, and in practicethey will, as far as possible, be protected from the action of dust andflying particles.

The spring 21 not only assists the wheel 24 in shifting the rod 22 tobring about the action of the detent 13 in order to automaticallyrelease the rod 11 when the belt 9 breaks or jumps from its pulleys; butit also during the normal action of the parts holds the roller 24against the belt in order to maintain the same in a tight condition.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In an appliance of the class described, a normally stationarygovernor-limiting rod, a slidable detent adapted to be engaged by saidrod, and a swinging governor-belt-controlled member-directly connectedwith said detent, said member being automatically shiftable on thebreakage of the governor-belt and serving, during such shifting motion,to operate the sliding detent for controlling the movementdetent inad'irection to release said governorlimiting rod and permit shiftingmovement of the latter.

2. In an appliance of the class described, a

of a governor, and a swinging belt-controlled member having a bifurcatedarm, the said detent having aslotto receive the bifurcated portion ofthe arm and having a pin in the slot to fit between the branches of thebifurcation.

3. In an appliance of the class described, a sliding detent forcontrolling-the movement of a governor, a rock-shaft provided with twoarms, one of which is directly connected with the detent, a rodconnected with the other arm and provided with a roller or wheel toengage a governor belt, said wheel being mounted for movement into andout of engagement with the belt independently of said rod,

and a spring arranged to act against that arm which is directlyconnected with the detent.

4. In an appliance of the class described, a casing, a sliding detent inthe casing for controlling the movement of a governor, said detenthaving a slot, and a pin in the slot, a rockshaft supported by thecasing, an arm connected with the rock-shaft in the casing, having aforked end fitted in said slot and arranged to receive said pin, and arod connected with the shaft outside the casing and provided with aroller to engage a governor-belt. 5. In an appliance of the classdescribed, a casing havinga perforation to receive a governor-limitingrod, a sliding detent in the casing adapted to be normally engaged bythe rod, and having a slot and a pin in the slot, an arm in the casing,having a forked end to enter the slot and to receive said pin, arock-shaft extending into the casing and provided at its inner end witha lug, one side of the hub of said arm being notched to receive said lugand the other side of the hub being supported for rock ing motion bythat wall of the casing opposite that carrying the shaft, a boltextending through the shaft and hub respectively, said shaft having onits outer side an arm, and a rod united to said last-mentioned arm andprovided with a belt-engaging roller.

6. In an appliance of the class described, a sliding detent forcontrolling the movement of a governor, a swinginggovernor-belt-controlled member for actuating the detent and providedwith a projecting portion movable into and out of engagement with thegovernor-belt independently of the said governor v belt-controlledmember.

7 In an appliance of the class described, a detent for controlling themovement of a governor, a swinging governor-belt-controlled member foractuating the detent and provided with a roller'arranged for movementinto and out of engagement with the belt independently of the saidgovernor-belt-controlled member.

8. In an appliance of the class described, a sliding detent forcontrolling the movement atively to the arm, to carry the roller out of:F

engagement with the belt.

- In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HARRY S. STORMER. Witnesses:

D. J. J ONES, M. (J. RUsH.

